Coffee machine



FIG. 1 is a front and left side isometric view of a coffee machine embodying our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a rear view thereof.

The broken lines in the drawings are included for the purpose of illustration and form no part of the claimed design. 

I claim the ornamental design of the coffee machine, as shown and described. 